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- Ore no Otouto ga Imouto ni natta Hanashi 1
- Ore no Seito wa Succubus Kamo Shirenai 2
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- Ore to Tamamo to My Room 3
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- OTOKONOKO Matome Hon 2013-2015+α 9
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- Otonari-san no Ko ni Ichiman Yen Agetara Iroiro Yarasetekureta 3
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- Otonashi-kun 2
- Otone's Original 2
- Otori Sousakan Kyouka 13
- Otosareru Seitokaichou 2
- Otoshigoro no Reimu-san 2
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- Otto Kounin Sex Advisor ni Hamatta Kekka 4
- Otto wa Gokuchuu Ippou Tsuma wa... 6
- OTU 1
- Ou-sama Appli 3
- Ou-sama no Oshigoto 2
- Ou-sama to Issho 2
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- Oujo no Meirei de Stalker to Kekkon Saserareru Hanashi 2
- Ouma no Oyome-san 5
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- OVER CRASH 2
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- Oyako no Ori 2
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- Oyashiki no Hi 3
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- Oyomesama Honey Days Ge 1
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- Oyomesan wa Maou!? 2
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- P3;TRIO 4
